Boat construction



Nov. 13, 1962 A. BRUMMER BOAT CONSTRUCTION 2 Sheets-Sheet 1 Filed July 22, 1959 Nov. 13,- 1962 A. BRUMMER 3,053,069

BOAT CONSTRUCTION Filed July 22, 1959 I 2 Sheets-Sheet 2 FIG.2

IN VENTOR ALFRED BRLIJIMMER United States Patent Ofitice 3,063,069 BOAT CONSTRUCTION Alfred Briimmer, Weil Der Stadt, Wurttemberg, Filed July 22, 1959, Ser. No. 828,885 Claims priority, application Germany July 26, 1958 1 Claim. (Cl. 9-6) Germany This invention relates to a boat propelled by a motor, which can be used as a sport boat and as a dinghy on yachts or for rescue work. According to the boat disclosed herein, certain disadvantages and imperfections which are still inherent in conventional keel-less boat construction are eliminated.

In the construction of my boat the two side walls of the boat are preformed and by means of connected flanges parts of the present boat are bound together to form a hollow profile that is essentially triangular in cross-section. In a well known method of construction the connected flanges are located at the upper boat edge. In these types of boats there is lacking a removable top or other structure extending fore and aft, which structure is necessary in completely outfitting a boat to make a closed boat possible.

Another well known type of boat provides several hollow floats, which are covered by a board which receives the cabin structure. This type of craft is unwieldy and expensive to manufacture and until recently could not be constructed with a pointed bow, wave tunnel and broad water-contacting surface.

In comparison with these well known boats the boat which is the subject of this invention is characterized by a construction in which the upper section and the lower section, which are joined through flanged edges, are interlocked with the side walls of the seat section. The seat section is box-like in form, and the walls of the center portion of the upper section forms an acute angle with the side walls of the upper section. This is omitted in other bow and stern oriented craft. The sloping surfaces of the bottom of the center portion and of the bottom of the trough-shaped lower section are inseparably bound together, for example, by means of glue.

It is another feature of the present invention that the flanged edges of the upper section and the lower section are connected by riveting or the like and serve as a support for an overlying bumper, which is made of rubber or rubber-like material.

The strength of the lower section is increased, according to this specification, by reinforcing ridges formed at the bottom of the boat.

According to other features of this new type of boat construction, a supporting plate for the mounting of an outboard motor is positioned on the aft deck wall of the upper section, and a railing fixed to the upper section is adapted to support a sliding top for covering the seating area.

Additional characteristics of the specification will be apparent from the following description.

In the drawing an embodiment of the construction of the invention is exhibited, and it shows:

FIG. 1 is a longitudinal section through the boat along line 11 of FIG. 2;

FIG. 2 is a top plan view of FIG. 3 is a transverse FIG. 1.

the boat, and section along the line 33 of 3,063,069 Patented Nov. 13, 1962 The new boat essentially comprises an upper section 1 and a lower section 2, in which upper section a box-like center portion 4 in the form of a seating area is located, the seating area being designated by reference numeral 3.

The side walls 5 of the center portion 4 form an acute angle with each of the laterally disposed walls 6 of the upper section 1, which extends to the fore in a front deck 7 and to the aft in a rear deck 8'.

Sloping surfaces 9 on the bottom 10 of the box-like center portion 4 overlie similar sloping surfaces 11 at the bottom 12 of the trough-shaped lower section 2 and are advantageously inseparably bonded to each other by means of an adhesive. At the front of the boat the bottoms 10 and 12 of the center portion 4 and the lower section 2, respectively, are joined by means of a transverse beam to which bottoms 10 and 12 are joined. The bottom 12 is stiflened through long ridges or ledges 13.

Formed on the upper section 1 and the lower section 2 are flanged edges, which lie against one another at 14 and are tightly connected by riveting or the like. They serve to retain an outwardly projecting bumper 15 made from rubber or rubber-like material by fitting snugly into an elongated slot in the bumpers. When the upper section 1 and the lower section 2 have been joined, the resulting structure has stabilizing, hollow compartments 16 and 17, which are essentially triangular in cross-section, and a further compartment 18 toward the bow of the boat and a sternward compartment 19, which is adapted to hold baggage. Conventional hatch means for permitting access to the compartment 19 may be pro vided.

The hollow compartments 16 and 17 can be filled with foaming material, which in the case of water leakage assures buoyancy and therefore the least possible damage to the boat.

The upper section 1 is provided with a railing 20, adapted to support a cover over the seating place 3. In the vicinity of the front deck 7 a steering wheel 21 is mounted on the upper section 1, as well as a windshield 22, a pennant support 23 and a hand grip 24. Furthermore, front lights 25 and side lights 26 are built into the upper section 1.

On the aft of the upper section rear lights 27 are located, and a motor support plate 28 is attached to the rear deck 8. A removable backrest 29 is inserted in the box-like center section 4. When this backrest is removed, seating area 3 can also be used as a sleeping area.

The new boat illustrated herein has excellent stability and is of light weight. It can be packed in special cartons for shipping and unpacked and fixed to vehicles by means of well known expandible frames or loaded on trailers.

I claim:

A boat, comprising a unitary, initially separate upper construction section including a bottom wall and, on each side of said boat, a pair of connected walls consisting of a side wall fixed to one side of said bottom wall and extending upwardly therefrom and a further wall connected at one end to said side wall and having its free end depending from said side wall and extending outwardly thereof; and a unitary, initially separate lower construction section joined to said free end of said further Wall at each side of said boat and forming with said pairs of connected walls elongated chambers extending longitudinally of said boat at each side thereof; each of said chambers having the general shape of a right triangle with its apex pointing upwardly, its base at the bottom of the triangle and its hypotenuse extending downwardly and outwardly from said apex to said base, said hypotenuse being formed from said further wall and an upstanding portion of said lower construction section, said further wall forming a major part of said hypotenuse, a bumper element covering the point between the parts of the hypotenuse, and an air chamber between the upper and lower sections and extending along the center line of the boat.

References Cited in the file of this patent UNITED STATES PATENTS 4 Johnson Jan. 11, Becker Apr. 7, Gilbert Nov. 16, Bowen May 22, Waring Aug. 7, Roberts et a1. Oct. 25, Blackmore Jan. 6, Stefani Aug. 30,

FOREIGN PATENTS Great Britain Feb. 2, Germany Jan. 30, Sweden June 22, France Mar. 2, 

